Issue 2, 2015
From the journal:

Journal of Materials Chemistry C

The temperature dependence of the heliconical tilt angle in the twist-bend nematic phase of the odd dimer CB7CB

C. Meyer,a   G. R. Luckhurstb  and  I. Dozov*a  

* Corresponding authors

a Physique des Systèmes Complexes, Université de Picardie Jules Verne, 80039 Amiens, France
E-mail: i.dozov@free.fr

b School of Chemistry, University of Southampton, Highfield, Southampton SO171BJ, UK

Abstract

We report precise birefringence measurements in the nematic, N, and in the twist-bend nematic, NTB, phases of the odd liquid crystal dimer CB7CB. The birefringence results obtained in large monodomains of the NTB phase strongly support its heliconical structure with doubly degenerate handedness and provide the temperature dependence of the conical tilt angle, θ. The birefringence measured in planar wall defects separating the monodomains with opposite sign of the chirality suggests a splay-bend structure of the nematic in this region, enabling a smooth transition between the adjacent right- and left-handed heliconical domains.

Graphical abstract: The temperature dependence of the heliconical tilt angle in the twist-bend nematic phase of the odd dimer CB7CB

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Article information

DOI
https://doi.org/10.1039/C4TC01927J
Article type
Paper
Submitted
27 Aug 2014
Accepted
16 Oct 2014
First published
16 Oct 2014

J. Mater. Chem. C, 2015,3, 318-328

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The temperature dependence of the heliconical tilt angle in the twist-bend nematic phase of the odd dimer CB7CB

C. Meyer, G. R. Luckhurst and I. Dozov, J. Mater. Chem. C, 2015, 3, 318 DOI: 10.1039/C4TC01927J

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